MAX6625/MAX6626
9-Bit/12-Bit Temperature Sensors with
Serial Interface in a SOT23
I2C-Compatible
General Description
Features
The MAX6625/MAX6626 combine a temperature sensor,
a programmable overtemperature alarm, and an I2Ccompatible serial interface into single compact packages.
They convert their die temperatures into digital values
using internal analog-to-digital converters (ADCs). The
result of the conversion is held in a temperature register,
readable at any time through the serial interface. A dedicated alarm output, OT, activates if the conversion result
exceeds the value programmed in the high-temperature
register. A programmable fault queue sets the number of
faults that must occur before the alarm activates, preventing spurious alarms in noisy environments. OT has programmable output polarity and operating modes.
The MAX6625/MAX6626 feature a shutdown mode that
saves power by turning off everything but the power-on
reset and the I2C-compatible interface. Four separate
addresses can be configured with the ADD pin, allowing
up to four MAX6625/MAX6626 devices to be placed on
the same bus. The MAX6625P/MAX6626P OT outputs are
open drain, and the MAX6625R/MAX6626R OT outputs
include internal pullup resistors.
The MAX6625 has a 9-bit internal ADC and can function
as a replacement for the LM75 in most applications. The
MAX6626 has a 12-bit internal ADC. Both devices come
in the space-saving 6-pin SOT23 package, or the 6-pin
TDFN package.
o 9-Bit Temperature-to-Digital Converter (MAX6625)
Applications
o 12-Bit Temperature-to-Digital Converter (MAX6626)
o I2C-Compatible Serial Interface
o Up to Four Devices on a Single Bus
o Versatile Alarm Output with Programmable Trip
Temperature and Hysteresis
o Low-Power Shutdown Mode
o Space-Saving TDFN or SOT23 Packages
o Lead-Free Version Available (TDFN Package)
Ordering Information
PART
MAX6625PMUT*
MAX6625RMUT*
MAX6625PMTT*
MAX6625RMTT*
MAX6626PMUT*
MAX6626RMUT*
MAX6626PMTT*
MAX6626RMTT*
PIN-PACKAGE
6 SOT23
6 SOT23
6 TDFN-EP**
6 TDFN-EP**
6 SOT23
6 SOT23
6 TDFN-EP**
6 TDFN-EP**
PKG CODE
U6F-6
U6F-6
T633-1
T633-1
U6F-6
U6F-6
T633-1
T633-1
Note: All devices operate over the -55°C to +125°C temperature
range.
*For device options, see Selector Guide at end of data sheet.
Requires special solder temperature profile described in the
Absolute Maximum Ratings section.
Fan Control
Temperature Alarms
System Temperature Control
Industrial Equipment
**EP = Exposed pad.
Typical Operating Circuit
Pin Configuration
VS
TOP VIEW
1kΩ 1kΩ
+
0.1µF
SDA 1
GND 2
6
MAX6625
MAX6626
SCL 3
4
5
10kΩ
(OMIT FOR MAX6625R
AND MAX6626R)
OT OUTPUT
ADD
MAX6625
MAX6626
4
SOT236
TDFN-EP**
6
VS
OT
1
3
5
SDA
SCL
TO I2C
MASTER
2
**EP = EXPOSED PAD
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-1841; Rev 5; 11/12
